Hydrant Testing for Hydraulic Model Calibration Technical

APPENDIX K

Hydrant Testing for Hydraulic Model Calibration Technical Memorandum, West Yost Associates

December 7, 2015

6800 Koll Center Parkway, Suite 150 Pleasanton, CA 94566 Phone 925 426-2580 Fax 925 756-5991 westyost.com

MEMORANDUM

DATE: December 7, 2015 Project No.: 418-02-14-36

SENT VIA: EMAIL

TO: Jack Bond, City of Modesto

CC: Glenn Prasad, City of Modesto

Miguel Alvarez, City of Modesto

FROM: Roberto Vera, RCE #83500

REVIEWED BY: Polly Boissevain, RCE #36164

SUBJECT: City of Modesto – Water Master Plan

Hydrant Testing for Hydraulic Model Calibration

This memorandum summarizes the proposed hydrant tests and testing procedures required to

calibrate the hydraulic model of the City of Modesto’s (City) existing contiguous water system.

This work is being conducted as part of the Water Master Plan project, and provides a plan for the

collection of the necessary field data. West Yost Associates’ (West Yost) recommended program

for hydrant testing is summarized below and provided for your review and comment.

HYDRANT TESTING PROGRAM

The hydrant testing program will be used to confirm and “spot-check” the roughness factors

(C-factors) that are assigned to pipelines in the City’s hydraulic model. West Yost will use data

collected directly through hydrant testing to verify if the current pipeline C-factors assigned in the

City’s hydraulic model are appropriate. Depending on this field testing to determine representative

C-factors by pipeline material type and pipeline age, pipeline C-factors may be adjusted in the

hydraulic model to better reflect field conditions.

Details related to the hydrant testing program are divided into the following four separate categories

and are discussed in more detail below:

• Personnel and System Data Requirements

• Hydrant Testing Schedule

• Testing Requirements and Procedure

• City Responsibilities

Mr. Jack Bond

December 7, 2015

Page 2

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Personnel and System Data Requirements

West Yost would like to request the following City personnel, system data, and supporting

documents to accomplish the recommended hydrant testing program under West Yost’s direction:

• A minimum of four City staff members (with vehicles and radio communications) that

will be available during regular working hours to assist with, but not limited to, the

following:

Closing and re-opening valves, as needed before and after hydrant testing,

Reading and recording hydrant pressure data,

De-chlorination at the flowing test hydrant,

Flowing the test hydrant,

Directing and controlling traffic, and hydrant flows, as necessary, to ensure safety

during these hydrant flow tests, and direct this discharged water into the nearest

drainage system during each test, and

Public outreach and interface, as necessary.

• System information before and during the hydrant testing period that includes the

following:

City’s SCADA system information for:

❖ Tank levels (water surface elevations),

❖ Booster Pump Stations (pump operational status, speed settings, discharge

pressures, and flows),

❖ MID Turnout (pump operational status, speed settings, discharge pressures, and

flows at Terminal Reservoir booster pump station), and

❖ Well Status (discharge pressure, flow, and speed settings, where applicable).

If the City’s SCADA system does not provide for historical archiving of these data,

or it is not possible to get this information in digital format, then manual readings at

key zone facilities that affect zone supply will need to be taken before, during, and

immediately after each hydrant test.

• One copy of the City’s Health and Safety Plan for testing hydrants.

It should also be noted that the City’s Fire Department conducts hydrant testing for their own use.

City staff has indicated that in the event that City Operations (Ops) Staff are not available to assist

with hydrant testing, it may be possible to reach out to the City Fire Department to help supplement

City Ops Staff. The City will be responsible for determining whether there is sufficient City Ops

Staff available to help conduct the hydrant testing or if additional staff from the City’s Fire

Department will be required.

Mr. Jack Bond

December 7, 2015

Page 3

Hydrant Testing Schedule

West Yost requests that the hydrant testing be scheduled during regular working hours at the City’s

earliest convenience. West Yost will meet with City staff at the beginning of each day to have a

brief field coordination meeting to review hydrant testing procedures and protocol (i.e., where to

go and what to do). West Yost will also use this coordination meeting to distribute pressure gauges

(hydrant wrenches to be provided by the City) necessary to complete the hydrant testing program.

Hydrant testing should continue on subsequent days until completion of the proposed

20 hydrant tests, anticipated to take approximately 2 full days.

Testing Requirements and Procedure

West Yost would like to conduct approximately twenty (20) hydrant flow tests, nineteen (19) within

the City’s existing contiguous service area and one within the Del Rio outlying service area. In

addition, two (2) alternative locations have been identified, if time permits, for a total of 22

proposed hydrant tests. Table 1 lists the 22 proposed hydrant test locations, which are also

illustrated on Figure 1. As shown on Figure 1, the selected hydrants are distributed throughout the

existing water service area and the Del Rio outlying service area; and were selected based on a

specific pipeline diameter, age, and material type, as summarized in Table 1. Table 1 also includes

additional details specific to each hydrant test related to the number of closed valves required to

conduct the test, whether the test is located near drainage features (e.g. parks, storm drain basins,

open lots, etc.), and if the test is a repeat test1.

Each hydrant test will involve maintaining flow from a single hydrant, while monitoring the

residual pressures at two to four observation hydrants located near the flowing hydrant. The field

observed static and residual pressure readings would then be used to confirm or adjust pipeline

C-factors to calibrate the hydraulic model to observed conditions. Hydrant test locations have been

selected to isolate pipelines of a particular material type, diameter, and age and some tests will

require that City personnel close one or more isolation valves prior to the test and re-open these

isolation valves following the test.

The general testing procedure at each of the hydrant test locations is outlined below and illustrated

on Figure 2. In addition, if GPS equipment is available, provided either by the City or by West Yost,

record the spatial location (XY coordinates and elevation) at the base (i.e. ground elevation) of the

flowing hydrant. Spatial location is important during the calibration effort because it confirms the

location and elevation at the flowing hydrant.

Step 1. Before the test, flush the test (flowing) hydrant and each observation hydrant

before attaching the pressure gage. (This allows sediments, which might

damage the gage or cause faulty readings, to be flushed out from the hydrant.)

Step 2. Attach the pressure gage to the hydrant with the gage’s test cock valve open.

Slowly open the hydrant and bleed off the gage with the gage’s test cock until

the hydrant is fully pressurized.

1 Tests identified as a “Repeat Hydrant Test” are repeat tests from the Hydraulic Model Calibration effort conducted

by West Yost in 2003. The purpose of repeating the hydrant test is to confirm or compare the assigned C-Factor

determined in the 2003 calibration effort.

o\c\418\02-14-36\wp\mp\hydantTM\061215_1

Mr. Jack Bond

December 7, 2015

Page 4

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Step 3. Close the gage test cock valve, and then measure the static pressures at the

designated test hydrant and each observation hydrant.

Step 4. Flow the designated test hydrant and measure the discharge flow and pressure.

Step 5. Measure the residual pressures at the designated test hydrant and at each

observation hydrant while the test hydrant is flowing.

Step 6. Continue monitoring pressure until the “all clear” is given by a West Yost

employee. Record the static pressure and then detach the pressure gage.

IMPORTANT: Before closing the hydrant, be sure the gage’s test cock valve

is open and bleeding while the hydrant is being closed.

At least one City staff member will be required at the flowing test hydrant and up to three (3)

additional City personnel will be required in the field to measure static and residual pressures at the

adjacent observation hydrants (refer to Attachment A). West Yost will provide two staff members

to direct, oversee, and assist in the field data collection work effort.

It is anticipated that each hydrant test will take no more than one half hour and that each hydrant

will be flowing for no more than 10 minutes during a test.

Testing Equipment West Yost will provide 2.5-inch and 4.5-inch diameter Swivel Piezo Diffusers and pressure gages

during the hydrant testing program. It is our recommendation that the 4.5-inch diameter Swivel

Piezo Diffuser be used for all proposed hydrant tests. For any hydrant test where it is not possible

to use this type of diffuser due to drainage or traffic control issues, an alternative method will need

to be further evaluated and confirmed before the day of field testing.

City Responsibilities

The City will be responsible for providing the following hydrant testing equipment:

1. Hydrant wrenches, and

2. Two-way portable communication for each of the testing personnel.

The City is also responsible for notifying other City staff and residents about the scheduled hydrant

testing, obtaining any approvals that may be required, providing proper drainage of the hydrant flow,

and providing equipment for de-chlorinating2 test water and personnel for traffic control, if required.

West Yost requests that City Ops staff review and inspect each of the proposed test locations before

the testing date to identify any potential problems or hazards with the selected locations. Of

particular concern will be the potential for flooding landscaping, building basements, or creating

hazardous traffic conditions. West Yost recommends that all drainage inlets/manholes be inspected

near the testing sites to confirm proper drainage. Additionally, location and status of valves that

will be closed during the hydrant testing should be checked. Detailed figures, which illustrate the

2 Handling of water released from each hydrant test will need to comply with the City Operations procedures and be

consistent with the City’s NPDES permit for planned releases from hydrant tests.

Mr. Jack Bond

December 7, 2015

Page 5

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flowing hydrant, observation hydrants, valves to be closed, and adjacent drainage features are

provided in Attachment A.

SUMMARY OF HYDRANT TESTING PROGRAM

Hydrant testing will be performed as described above during regular operations staff working hours.

The City is responsible for notifying other City staff including local residents/businesses about the

hydrant testing program and coordinating with the City’s Fire Department, as needed.

West Yost requests a conference call or meeting with City staff approximately two weeks before

the scheduled testing day to review and identify any potential issues that may occur during hydrant

testing such as unavailable SCADA system data. An Outlook meeting request will be sent to City

staff to schedule a suitable meeting date and time. In the meantime, please feel free to contact

Bobby Vera at 925-425-5624 if you have any questions or comments.

Mr. Jack Bond

December 7, 2015

Page 6

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Table 1. Hydrant Test Locations(a)

Test No.

Pipeline Material

Installation Year

Pipeline Diameter,

inches Location

No. of Closed Valves Comments(a)

1 AC 1973 6 Near the intersection of Ortega Rd. and Galvez Ave.

2 -

2 CI 1966 6 Along Kientiz Ave. near Steuden Wy. 2 -

3 AC 1992 8 Along Norik Dr. near Manor Oak Dr. 1 -

4 AC 1986 6 Along Pantaleo Dr. near Carmella Wy. 1 -

5 AC 1959/1965 6 Along Wycliffe Dr. near Scenic Dr. 2 Repeat Hydrant Test

6 AC 1989 6 Along Larned Ln. near Goodland Ct. 1 -

7 AC 1970 6 Along El Goya Dr. near N. Riverside Dr. 1 -

8 STL 1962 6 Along Moran Ave. near Phoenix Ave. 2 -

9 AC 1986 6 Along Albion Way near July Dr. 2 -

10 AC 1980 10 Along Jim Wy. Near Olivero Rd. 1 Repeat Hydrant Test,

Near Drainage Feature 11 AC 1981 8 Along Hanh Dr. near

English Oaks Dr. 2 Near Drainage Feature

12 CI 1939 6 Along Hilton St. near Enslen Ave. 2 -

13 CI 1959 6 Along Lauralee Ct. near Carver Rd. 1 -

14 CI 1977 6 Along Wellington Dr. near York Wy. 1 -

15 AC 1976 6 Along Rugby Ln. near Rexford Dr. 1 -

16 AC 1981 8 Along Elmo Loop near Snyder Ave. 1 Well 63 will need to be

offline 17 STL Unk(b) 8 Along River Rd. near

Herndon Rd. 3 -

18 PVC Unk(b) 8 Along Country View Dr. near Stonegate Dr. 2 Del Rio

19 STL 1945/2000 6 Along Paradise Rd. near Pauline Ave. 1 -

20 AC 1978/1986 10 Along Semallon Dr. near Virginia Corridor 3 Near Drainage Feature

21 AC 1980 6 Along Melgren Ave. near Gagos Dr. 1 Alternate location to be

tested, time permitting 22 PVC Unk(b) 8 Along Anada Ct. near

Greco Ln. 1 Alternate location to be testing, time permitting

(a) 20 Test Locations and 2 Alternate Test Locations. (b) Hydrant test will be used to confirm the C-Factor in this area, since age is not known.

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ATTACHMENT A

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#*

LA PALMA DR

HADDON AVE

N RI

VERS

IDE D

REL PASADO DR

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DR

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EL GRECO DR

EL GOYA DR

EL CHARRO DR

40

#7#7A

#7B#7C

Figure A-7Test 7



Last

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5 5:40

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to\02

-14-36

Wate

r Mas

ter P

lan\G

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ures\H

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G!. Observed Hydrant!( Hydrant#* Active Well




!(

N RI

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0 300150

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CREEK VIEW CT

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RED OAK DR

SCENIC VIEW CT

PARR

Y AV

EFORT

UNA

AVE

PHOENIX

AVE

EL V

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AVE

EDGEBROOK DR

ENCINA AVE

ADA ST

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LANCE ST

POST OAK DR

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SHAW AVE

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LD D

R

VIOLA ST

ELLIS ST

OAKS

HIRE

AVE

#8 #8A #8B

Figure A-8Test 8

(6" STL - 1962) City of Modesto


Last

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5 5:40

:19 P

M O

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of M

odes

to\02

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Wate

r Mas

ter P

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vera

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3

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BLUE GUM AVE

CHAPPARAL PL

MORS

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JULY

CT

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DR

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BAYLOR WY

BRANDEIS WY

MARCH CT

SWAR

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RE D

R

POUS

T RD

HOBART CT

ABEL CT

OCTOBER WY

#9

#9A

#9B

#9C

Figure A-9Test 9



Last

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56:32

PM

O:\C

lients

\418 C

ity of

Mod

esto\

02-14

-36 W

ater M

aster

Plan

\GIS\

Figure

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est M

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est23

.mxd

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ra

Symbology

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" Storm Drain Inlet

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RELIA

NCE

ST

ANGE

LO W

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#10

#10A

#10B

#10C#10D

Figure A-10Test 10



Last

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7:27 P

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Wate

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ter Pl

an\G

IS\Fi

gures

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est M

emo\T

est10

_1.m

xd : b

vera

Symbology

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" Storm Drain InletStorm Drain Basin

0 250125

Scale in Feet

"

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#11B

#11

#11A

#11C

Figure A-11Test 11



Last

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5 5:39

:50 P

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odes

to\02

-14-36

Wate

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ter P

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ures\H

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t Tes

t Mem

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: bve

ra

Symbology

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!( 3

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0 250125

Scale in Feet

"

"

""

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"

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ST#12B

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#12C

Figure A-12Test 12



Last

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5 5:48

:42 P

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odes

to\02

-14-36

Wate

r Mas

ter P

lan\G

IS\Fig

ures\H

ydran

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ra

Symbology

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HILTON ST

#12

0 200100

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"

"

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"

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LAURALEE CT

#13B#13A

#13

Figure A-13Test 13



Last

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5 1:00

:04 P

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odes

to\02

-14-36

Wate

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ter P

lan\G

IS\Fig

ures\H

ydran

t Tes

t Mem

o\Tes

t13_1

.mxd

: bve

ra

Symbology

*G!. Flow Hydrant




" Storm Drain Inlet

0 300150

Scale in Feet

33

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YORK

WY

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S ST

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LEXINGTON DR#14A

#14

#14B

Figure A-14Test 14



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5 1:11

:51 P

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odes

to\02

-14-36

Wate

r Mas

ter Pl

an\G

IS\Fi

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\Hyd

rant T

est M

emo\T

est14

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xd : b

vera

Symbology

*G!. Flow Hydrant





0 250125

Scale in Feet

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RD W

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#15C #15B

#15A

#15

Figure A-15Test 15



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5 11:0

9:19 A

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:\Clie

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odes

to\02

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Wate

r Mas

ter P

lan\G

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ra

Symbology

*G!. Flow Hydrant




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0 200100

Scale in Feet

" "

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VINTAGE COVE

SPAR

ROW

CT

ELMOLO OP

63

#16C

#16B

#16A

#16

Figure A-16Test 16



Last

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5 1:36

:15 P

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:\Clie

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of M

odes

to\02

-14-36

Wate

r Mas

ter P

lan\G

IS\Fig

ures\H

ydran

t Tes

t Mem

o\Tes

t16_1

.mxd

: bve

ra

Symbology

*G!. Flow Hydrant





Well 63 will need to be manually shut downduring hydrant testing.

0 500250

Scale in Feet

""

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CLING CTRAINBOW LN

CHANEY DR

VERDEA CT

214

#17A

#17

#17B #17C

Figure A-17Test 17

(8" STL - UNK) City of Modesto


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07:11

PM

O:\C

lients

\418 C

ity of

Mod

esto\

02-14

-36 W

ater M

aster

Plan

\GIS

\Figu

res\H

ydran

t Tes

t Mem

o\Tes

t24.m

xd : b

vera

Symbology

G!. Observed Hydrant!( Hydrant#* Out of Service Well




!(

3

3

3 3

3

3

33

!(

3

3

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!(

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3

3

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3

RIVER RD

3

3

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0 250125

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#*

COUNTRY VIEW DR

WOODSTONE DR

STON

EGAT

E DR

RIVER NINE DR

H ILL CRE ST DR

282

#18

#18B#18C

#18A

Figure A-18Test 18 (W Del Rio)

(8" PVC - UNK) City of Modesto


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15 3:

09:59

PM

O:\C

lients

\418 C

ity of

Mod

esto\

02-14

-36 W

ater M

aster

Plan

\GIS\

Figure

s\Hyd

rant T

est M

emo\T

est18

.mxd

: bve

ra

Symbology




Note:1. It is recommended that Well 282 remain online during the test. However, during the hydrant test, water will need to be flushed for a slightly longer period of time until Well 282 has stabilized, since it is pressure controlled. 2. Well 282 will also need to be isolated from Stonegate Dr., as shown on the closed valve details on this figure.

3

3!(

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0 800400

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3

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G!.

RIVERDALE AVEPARKDALE DR

W HATCH RD

PARADISE RD

COOK AVE

VINEY

ARD

HAVE

N

MOSH

ER AV

E

GRIM

ES AV

E

VIVIA

N RD

PAUL

INE A

VE

SOUTH ROSEMORE AVE

#19D#19C

#19

#19A

#19B

Figure A-19Test 19

(6" St - 2000/1945) City of Modesto


Last

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5 5:29

:20 P

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:\Clie

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of M

odes

to\02

-14-36

Wate

r Mas

ter P

lan\G

IS\Fig

ures\H

ydran

t Tes

t Mem

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t19_1

.mxd

: bve

ra

Symbology

*G!. Flow Hydrant




!(

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Figure A-20Test 20

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Figure A-22Test 22

(8" PVC - Unknown) City of Modesto


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Documents

Hydrant Testing for Hydraulic Model Calibration Technical